Add type hints to homeassistant.auth (#15853)

* Always load users in auth store before use

* Use namedtuple instead of dict for user meta

* Ignore auth store tokens with invalid created_at

* Add type hints to homeassistant.auth

tox.ini

@@ -58,4 +58,4 @@ whitelist_externals=/bin/bash
 deps =
      -r{toxinidir}/requirements_test.txt
 commands =
-         /bin/bash -c 'mypy homeassistant/*.py homeassistant/util/'
+         /bin/bash -c 'mypy homeassistant/*.py homeassistant/auth/ homeassistant/util/'